Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie as juntas para mangueira azul.
 ###Tabelas: CREATE TABLE club_official (club_official_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Period VARCHAR, Managed INT, Drawn INT, Lost INT, Win % VARCHAR) CREATE TABLE football_league_cup (football_league_cup_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Round VARCHAR, Opponent VARCHAR, Venue VARCHAR, Result VARCHAR, Attendance INT) CREATE TABLE am (am_id AUTO_INCREMENT PRIMARY KEY, Freq INT, Call VARCHAR, City VARCHAR, Owner VARCHAR, Start INT, Day Power ( W ) INT, Night Power INT, Nickname VARCHAR, Format VARCHAR, Stereo VARCHAR) CREATE TABLE rail (rail_id AUTO_INCREMENT PRIMARY KEY, Train Number VARCHAR, Train Name VARCHAR, Origin VARCHAR, Destination VARCHAR, Frequency (inbound/outbound) VARCHAR) CREATE TABLE former_conference_members (former_conference_members_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Founded INT, Type VARCHAR, Enrollment INT, Nickname VARCHAR, Joined VARCHAR, Left VARCHAR, Current Conference VARCHAR)  
SELECT Joined FROM former_conference_members WHERE Nickname = Blue Hose